The city and the union met with mediator David Weinberg all day Monday. Cuevas said the union and city negotiators would continue to meet with Weinberg in an effort to resolve issues about wages and working conditions that precipitated the strike. More than 3,000 city workers represented by the SEIU 1021 and IFPTE Local 21 had been striking since Tuesday

===============earlier:The strike involves about 3,000 city workers represented by two unions, SEIU Local 1021 and IFPTE Local 21, said Chris Fink of SEIU. Union officials said the strike originally was expected to take place only on Tuesday, but was extended to a second day because the two sides had not returned to the bargaining table.